Hi there,
I did my CPL and am currently doing my IR at BCFT in Bournemouth and can't recommend them highly enough! I did my CPL on the single engine, so initially on the PA-28 Cadet/Warrior and then on the PA-28 Arrow. Great school, fantastic, knowledgeable instructors and pretty well maintained aircraft too.
I've also done flying at Leicester and if it wasn't for wanting to do my MEP and IR at the same time, I did consider doing my CPL at Leicester. If it is just the CPL you are wanting to do, I would recommend Leicestershire Aero Club and it would probably be cheaper than doing it at BCFT.